UJI VALIDITAS E-MODUL BERBASIS PROBLEM BASED LEARNING MENGGUNAKAN HEYZINE PADA MATERI ASAM BASA FASE F SMA/MA. BIOCHEPHY: Journal of Science Education, [S. l.], v. 5, n. 2, p. 1053–1059, 2025. Disponível em: https://www.staging-journal.moripublishing.com/index.php/biochephy/article/view/1805. Acesso em: 10 nov. 2026.